Depends on content. If you are talking exclusively dungeon runs, Warriors have the advantage, while Dark Knights are slightly disadvantaged.

Anything beyond that tanks are too homogenized for it to truly matter. Paladins are very slightly disadavantaged whenever multiple possible invuln moments come up (long invuln CD), in return they have +1 group damage reduction, so it's mostly a wash. There are minor differences, but they're far too small to have a measurable impact.